Conventional pulse-echo ultrasonic sensors can only measure the distance to the nearest object. Using multiple receivers it makes possible to measure th accurate directions. In such a method, much wider directivity of the transmitter is required for measuring much wider area. We made an experiment of simultaneous transmitting of transducers on sonar ring for getting much wider directivity, as well as the simultaneous measurement of the time-of-flight differences.

Notes

Note: (in Japanese)

Text Reference

Teruko Yata and S.Yuta, "A Sonar Ring Sensor for a Mobile Robot with Simultaneous Transmission and Receive to Measure the Direction of the Object," Proceedings of the 14th RSJ conference, November, 1996, pp. 515 - 516.